How Long To Charge A Car Battery At 8 Amps. Now in the upcoming section lets get an answer to how long a 12-volt battery will take to get charged at 10 amps. This means that when the battery is completely charged it will deliver 1 amp for a period of 48 hours or 2 amps for a period of 24 hours or eight amps for a period of 6 hours.

At the top youll be able to see where your car battery rating would fit in. However you dont have to fully charge the battery in order to start the car. A 40 amp battery charger is an extremely powerful device.
54 amp X 75 or 75 6 amp 675 hours.
The power and longevity of a battery is noted by its Amp Hour Ah rating. A three-stage or smart charger is recommended for the best results. Basically this denotes how long a battery will last if it isnt recharged. A battery of this rating should last for 25 hours while producing power of 8 amps.
